package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;

    /**
     * 添加菜品
     * @param dishDTO
     */
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();

        BeanUtils.copyProperties(dishDTO, dish);

        dishMapper.insert(dish);

        List<DishFlavor> dishFlavors = dishDTO.getFlavors();
        if(dishFlavors != null && !dishFlavors.isEmpty()) {
            Long dishId = dish.getId();

            dishFlavors.forEach(dishFlavor -> dishFlavor.setDishId(dishId));

            dishFlavorMapper.insertBatch(dishFlavors);
        }
    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 根据id批量删除菜品
     * @param ids
     */
    @Transactional
    public void deleteBatch(List<Long> ids) {
        //判断当前菜品是否能删除---状态是否为起售
        for(Long id : ids) {
            Dish dish = dishMapper.getById(id);
            if(dish.getStatus() == StatusConstant.ENABLE) {
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }

        //判断当前菜品是否能够删除---是否被套餐关联了
        List<Long> list = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if(list != null && !list.isEmpty()) {
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

//        //删除菜品表中的菜品数据
//        for(Long id : ids) {
//            dishMapper.deleteById(id);
//
//            //删除菜品关联的口味数据
//            dishFlvorMapper.deleteById(id);
//        }

        //删除菜品表中的菜品数据
        dishMapper.deleteByIds(ids);
        //删除菜品关联的口味数据
        dishFlavorMapper.deleteByIds(ids);
    }

    /**
     * 根据id查询菜品
     * @param id
     * @return
     */
    public DishVO getById(Long id) {
        DishVO dishVO = new DishVO();

        Dish dish = dishMapper.getById(id);

        BeanUtils.copyProperties(dish, dishVO);

        List<DishFlavor> list = dishFlavorMapper.getByDishId(id);

        dishVO.setFlavors(list);

        return dishVO;
    }

    /**
     * 修改菜品
     * @param dishDTO
     */
    @Transactional
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();

        BeanUtils.copyProperties(dishDTO, dish);

        dishMapper.update(dish);

        dishFlavorMapper.deleteById(dishDTO.getId());

        List<DishFlavor> list = dishDTO.getFlavors();
        if(list != null && !list.isEmpty()) {
            Long dishId = dishDTO.getId();
            list.forEach(dishFlavor -> dishFlavor.setDishId(dishId));
            dishFlavorMapper.insertBatch(list);
        }
    }

    /**
     * 启用禁用菜品
     * @param status
     */
    public void StartOrStop(Integer status, Long id) {
        Dish dish = new Dish();

        dish.setId(id);
        dish.setStatus(status);

        dishMapper.update(dish);
    }

    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    public List<Dish> selectByCategoryId(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .build();
        return dishMapper.list(dish);
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
